Sotod-box



F. CIRELLI.

SOUND BOX.

APPLICATION FILED AUG.6. 1918- 1,314,127. Patented Aug. 26, 1919.

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APPLICATION 6. I918. 1 ,314, 127. Patented Aug. 26,1919.

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FRANCESCO CIBELLI, OF PHILADELPHIA, PENNSYLVANIA.

SOUND-BOX.

Specification 01' Letters Patent.

Patented Aug. 26, 1919.

Application filed August 6, 1916. Serial No. 248,657.

T 0 all whom it may concern:

Be it known that I, FRANCESCO CIRELLI, a subject of the King of Italy,residing at Philadelphia, in the county of Philadelphia, and State ofPennsylvania, have invented certain new and useful Improvements inSound-Boxes, of which the following is a specification.

One object of my invention is to so construct an improved sound box forsound reproducing machines that a record-engaging needle can be securedthereto in such manner as to permit the needle to engage the soundreproducing grooves of the record from either side of the center of therecord. Thus with the aid of my invention a left handed person can usethe same with as much precision and convenience as a right handedperson.

Another object is to make my inproved sound box in such manner that itcan be quickly manufactured and assembled and so that it will be strongand durable.

Another object is to make .my improved sound box in such manner that animproved uality of sound will be produced and so hat the volume of soundcan be varied.

These objects and other advantageous ends which will be describedhereinafter, I attain in the following manner, reference being had tothe accompanying drawings in which- Figure 1 is a front elevation of myimproved sound box,

Fig. 2 is a' sectional elevation taken on the line 22 of Fig. 1,

Fig. 3 is an enlarged sectional plan view 9 taken on the line 3-3 ofFig. 1,

Fig. 4 is a fragmentary elevation of a portion of a ring section whichforms a part of mv invention,

Fig. 5 is an enlarged fragmentary section taken on the line 5-5 of Fig.2 through the needle holding end of the stylus bar,

Fig. 6 is a section taken on the line 6-6 of Fig. 7 is a front elevationof the needle holding end of the stylus bar,

Fig. 8 is a view of similar nature to Fig. 7, showing a needle thereinextending at suchangle as to permit its entrance to the soundreproducing grooves from one side of the record,

Fig. 9 is a view of similar nature to Fig. 8, showing the needle thereinextending at an angle opposite to that shown in Fig. 8

Referring to the drawings, the sound box 12 includes two sections 13 and14. The section 13 is in the form of a circular plate having a soundoutlet hole 15 and a sleeve 16 in alinement therewith, said sleeveformlng means of attachment to a tone arm, such for example as the tonearm 17. The section 13 has a circular recess 18 in which fits a gasket19 preferably made of soft rubber.

The section 14 is made in the form of a ring and has a circular recess20 in which is fitted a gasket 21 also preferably made of rubber and ofsubstantially the same diameter as the gasket 19.

The diaphragm 22 has it peripheral edge portion between the two gaskets19 and 21 and screws 23 extend through the section 14 into tapped holesin the section 13 and thereby serve to clamp the diaphragm between thegaskets 19 and 21. The ring section 14 has a notch 24 in its peripheraledge and this notch has its side portions 25 tapering inwardly tocorrespond with the outer surface 26 of a rin 27.

This ring 27 is tted'within the notch 24 so that the surface 26coincides with the surfaces 25 of the notch 24 and a screw 28 passesthrough the ring'27 into a tapped hole 29 of the rear section 13 (seeFigs. 2,

. 3, and 4;.

A sty us bar 30 has its upper end connected to the diaphra 22 and passesdownment 33 of the stylus bar 30. Pressure is thereby brought to bearupon the stylus bar to vary the volume of the sound.

the device.

The notch 24 erforms two valuable functions. In the rst place it forms asecure backing for the ring 27, and in the second place when the ringsection 14 is placed in position together with the ring 27 the holes forthe grooves 23 will be brought into register. Thus the parts can bequickly assembled.

The needle holding end 37 of the stylus bar 30is enlarged to provide atop ledge 38 and two ducts 39 and 40 cross each other in the plane ofthe section 5-5 and have their upper ends opening at the ledge 38 andtheir lower ends opening onto the bottom surface 41. These ducts 39 and40 thus extend at an incline to eachother in opposite directions.

A tapped hole 42 is provided which intersects both of the ducts 39 and40-and a tightening screw 43 fits the hole 42 and is adapted, whenscrewed inwardly, to secure a sound reproducing needle 44 in either ofthe ducts 39 and 40. For example Fig. 8 shows a needle secured in theduct 39 and Fig. 9 shows a needle secured in the duct 40.

Another duct 45 is formed in the needle holding end 37 andslantsforwardly and is intersected by the tapped hole 42. Thus a needlepositioned within the duct 45 can be secured by the tightening screw 43,as clearly shown in Figs. (Sand 10.

Considering that a record 46 is rotating in the direction of the arrowsin Fig. 11 and a needle 44 is inserted within the duct 40, the tonearm17can be so positioned as to bring the needle into engagement with thesound transmitting grooves of the record at the right side of the center47 and the record can thus be played in the usual manner.

' If, on the contrary, a needle is inserted within the duct 39 andsecured therein by the tightening screw 43, the record can be played bymoving the needleinto engagement with the grooves at the left of thecenter 47. I

In some makes of records the needle when asters? played from oppositesides of the center without changing the Y direction of rotation of therecord.

The volume of sound can be varied by varying the pressure of the screw36 on the stylus bar 30 and the diaphragm is firmly held between thegaskets so as to give an accurate transmission of the sound. v

By having the ducts 39, 40, and 45 open at the ledge 38 various lengthneedles can be used and if desired a'portion of the blunt end of theneedle can project above the ledge. Thus a verv short or long portion ofthe needle can project beyond the bottom surface 41 and the volume ofsound can be regulated by this provision.

While I have described my invention as taking a particular form, it willbe understood that the various parts of my inven-- tion may be changedwithout departing from the spirit thereof, and hence I do not limitmyself to the precise construction set forth, but consider that I am atliberty to make such changes and alterations as fairly come within thescope of the appended claim.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent is:

A sound box including a needle holding portion having needle retainingducts extending at an incline to each other in opposite directionswhereby a needle can be secured at an incline in either of said ducts soas to permit the engagement of the needle with the reproducing portionof a record at opposite sides of the center of rotation of said recordduring the rotation of said record in the same direction, substantiallyas described.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

, FRANCESCO GIRELLI.

Witnesses:

JOHN N. LE PIERRE, MARY A. 1116MB.

